The first picture is after trying to clean them you can see they still were very pitted and ugly...
The 2nd picture is after i bought new ones. The last picture is a comparison of how yellow and pitted old ones are vs the new ones.
You don't need to spend 500 on new headlights, just get the lenses. I included a link but it didn't go through.
Its 99$, check on bimmian dot com's website.